2x15W Stereo / 1x30W Mono Digital Audio Amplifier Features 16/18/20/24-bit input with I 2 S, Left-alignment and Right-alignment data format PSNR & DR (A-weighting) Loudspeaker: 97dB (PSNR), 105dB (DR) @24V Multiple sampling frequencies (Fs) 32kHz / 44.1kHz / 48kHz and 64kHz / 88.2kHz / 96kHz and 128kHz/176.4kHz/192kHz System clock = 64x, 128x, 256x, 384x, 512x, 768x, 1024x Fs 256x~1024x Fs for 32kHz / 44.1kHz / 48kHz 128x~512x Fs for 64kHz / 88.2kHz / 96kHz 64x~256x Fs for 128kHz/176.4kHz/192kHz Supply voltage 3.3V for digital circuit 10V~26V for loudspeaker driver Loudspeaker output power for 24V 10W x 2CH into 8Ω @0.27% THD+N for stereo 15W x 2CH into 8Ω @0.35% THD+N for stereo 20W x 1CH into 4Ω @0.25% THD+N for mono 30W x 1CH into 4Ω @0.32% THD+N for mono Anti-pop design Over-temperature protection Internal PLL Under-voltage shutdown Over-current protection I 2 C control interface Zero detection Power limit function Quaternary and ternary switch Applications CD and DVD LCD TV Car audio Boom-box MP3 docking systems Powered speaker Wireless audio USB speaker Description is a digital audio amplifier capable of driving a pair of 8Ω,15W or a single 4Ω,30W speaker, both which operate with play music at a 24V supply without external heat-sink or fan requirement. Using I 2 C digital control interface, the user can control s input format selection, mute and volume control functions. has many built-in protection circuits to safeguard from connection errors. ORDERING INFORMATION Product ID Package Packing / MPQ Comments -LE48NAY E-LQFP-48L 7x7 mm 2.5K Units / Small Box (250 Units / Tray, 10 Trays / Small Box) Green -LE48NAR E-LQFP-48L 7x7 mm 2K Units Tape and Reel Green Revision: 1.2 1/30
Pin Assignment RA GNDR RB VDDRB VDDLB LB GNDL LA VDDLA PLL MCLK CLK_OUT DGND DVDD DEF SDATA 1 2 3 4 5 6 7 8 9 10 11 12 48 13 47 14 46 15 45 16 44 17 43 18 42 19 41 20 40 21 39 22 38 23 37 24 36 35 34 33 32 31 30 29 28 27 26 25 VDDRA DVDD DGND SDA SCL SA1 SA0 RESET ERROR PD BCLK LRCIN MONO Pin Description PIN NAME TYPE DESCRIPTION CHARACTERISTICS 1 VDDLA P Left channel supply A 2 NC 3 NC 4 NC 5 NC 6 PLL I PLL enable, low active Schmitt trigger TTL input buffer 7 MCLK I Master clock input Schmitt trigger TTL input buffer 8 CLK_OUT O Clock output from PLL TTL output buffer 9 DGND P Digital Ground 10 DVDD P Digital Power 11 DEF I Default volume setting Schmitt trigger TTL input buffer 12 SDATA I Serial audio data input Schmitt trigger TTL input buffer 13 NC Revision: 1.2 2/30
14 MONO I MONO mode enable, high active Schmitt trigger TTL input buffer 15 LRCIN I Left/Right clock input (Fs) Schmitt trigger TTL input buffer 16 BCLK I Bit clock input (64Fs) Schmitt trigger TTL input buffer 17 PD I Power down, low active Schmitt trigger TTL input buffer 18 ERROR O Error status, low active Open-drain output 19 RESET I Reset, low active Schmitt trigger TTL input buffer 20 SA0 I I 2 C select address 0 Schmitt trigger TTL input buffer 21 SA1 I I 2 C select address 1 Schmitt trigger TTL input buffer 22 NC 23 NC 24 SCL I I 2 C serial clock input Schmitt trigger TTL input buffer 25 SDA I/O I 2 C bi-directional serial data Schmitt trigger TTL input buffer 26 DGND P Digital Ground 27 DVDD P Digital Power 28 NC 29 NC 30 NC 31 NC 32 NC 33 NC 34 NC 35 NC 36 VDDRA P Right channel supply A 37 RA O Right channel output A 38 NC 39 GNDR P Right channel ground 40 NC 41 RB O Right channel output B 42 VDDRB P Right channel supply B 43 VDDLB P Left channel supply B 44 LB O Left channel output B 45 NC 46 GNDL P Left channel ground 47 NC 48 LA O Left channel output A Revision: 1.2 3/30
Functional Block Diagram PLL BCLK SDATA LRCIN Input Interface I2C Control Interface Audio Signal Processing SDM PLL Internal System Clock PCM to PWM Logic Interface Loudspeaker Driver ERROR L R Available Package Package Type Device No. θ ja ( /W) Ψ jt ( /W) θ jc ( /W) Exposed Thermal Pad 7x7 48L E-LQFP 27.4 1.33 6.0 7x7 48L QFN 23.7 0.09 5.1 Yes (Note1) Note 1.1: The thermal pad is located at the bottom of the package. To optimize thermal performance, soldering the thermal pad to the PCB s ground plane is suggested. Note 1.2: θ ja is measured on a room temperature (T A =25 ), natural convection environment test board, which is constructed with a thermally efficient, 4-layers PCB (2S2P). The measurement is tested using the JEDEC51-5 thermal measurement standard. Note 1.3: θ jc represents the heat resistance for the heat flow between the chip and the package s top surface. Note 1.4: Ψ jt represents the heat resistance for the heat flow between the chip and the exposed pad s center. Absolute Maximum Ratings Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. Symbol Parameter Min Max Units DVDD Supply for Digital Circuit -0.3 3.6 V VDDL/R Supply for Driver Stage -0.3 30 V V i Input Voltage -0.3 3.6 V T stg Storage Temperature -65 150 T a Ambient Operating Temperature 0 70 o C o C Revision: 1.2 4/30
Recommended Operating Conditions Symbol Parameter Typ Units DVDD Supply for Digital Circuit 3.15~3.45 V VDDL/R Supply for Driver Stage 10~26 V T a Ambient Operating Temperature 0~70 o C Digital Characteristics Symbol Parameter Min Typ Max Units V IH High-Level Input Voltage 2.0 V V IL Low-Level Input Voltage 0.8 V V OH High-Level Output Voltage 2.4 V V OL Low-Level Output Voltage 0.4 V C I Input Capacitance 6.4 pf General Electrical Characteristics Symbol Parameter Condition Min Typ Max Units I PD (HV) PVDD Supply Current during Power Down PVDD=24V 10 ua I PD (LV) DVDD Supply Current during Power Down DVDD=3.3V 10 ua T SENSOR Junction Temperature for Driver Shutdown 160 Temperature Hysteresis for Recovery from Shutdown 40 UV H Under Voltage Disabled (For DVDD) 2.8 V UV L Under Voltage Enabled (For DVDD) 2.7 V Rds-on Static Drain-to-Source On-state Resistor, PMOS PVDD=24V, 295 mω Static Drain-to-Source On-state Resistor, NMOS Id=500mA 185 mω I SC LI Channel Over-Current Protection (Note 2) PVDD=24V 5 A Mono Channel Over-Circuit Protection (Note 2) PVDD=24V 10 A Note 2: Loudspeaker over-current protection is only effective when loudspeaker drivers are properly connected with external LC filters. Please refer to the application circuit example for recommended LC filter configuration. o C o C Marking Information Line 1 : LOGO Line 2 : Product no. Line 3 : Tracking Code Line 4 : Date Code ESMT Tracking Code Date Code PIN1 DOT Revision: 1.2 5/30
Application Circuit Example for Stereo Revision: 1.2 6/30
Application Circuit Example for Stereo (Economic type, moderate EMI suppression) Revision: 1.2 7/30
Application Circuit Example for Mono Revision: 1.2 8/30
Electrical Characteristics and Specifications for Loudspeaker Stereo output with 24V supply voltage Condition: DVDD=3.3V, VDDL=VDDR=24V, F S =48kHz, Load=8Ω with passive LC low-pass filter (L=22μH with R DC =0.12Ω, C=470nF); Input is 1kHz sinewave. Volume is 0dB unless otherwise specified. Symbol Parameter Condition Input Level Min Typ Max Units P O RMS Output Power (THD+N=0.35%) +8dB volume 15 W (Note 9) RMS Output Power (THD+N=0.27%) +8dB volume 10 W THD+N Total Harmonic Distortion + Noise -1dB 0.46 % SNR Signal to Noise Ratio (Note 8) -1dB 97 db DR Dynamic Range (Note 8) -60dB 105 db PSRR Power Supply Rejection Ratio -60dB 59 db Channel Separation -1dB 73 db Note 8: Measured with A-weighting filter. Note 9: Thermal dissipation is limited by package type and PCB design. The external heat-sink or system cooling method should be adopted for the larger RMS output power. Total Harmonic Distortion + Noise vs. Output Power (Stereo) Revision: 1.2 9/30
Total Harmonic Distortion + Noise vs. Frequency (Stereo) Spectrum at Peak SNR (Stereo) Spectrum at -60dB Signal Input Level (Stereo) Revision: 1.2 10/30
Efficiency (Stereo) Efficiency vs. Output Power (Stereo) Efficiency(%) 100 90 80 70 60 50 40 30 20 10 0 12V 15V 18V 24V 0 10 20 30 40 50 60 70 2CH Output Power(W) Efficiency (Stereo) for PWM of Quaternary and Q+T Modulation Efficiency vs. Output Power (Stereo) Efficiency(%) 100 90 80 70 60 50 40 30 20 10 0 24V Q+T 24V 0 10 20 30 40 50 60 70 2CH Output Power(W) Revision: 1.2 11/30
Electrical Characteristics and Specifications for Loudspeaker Mono output with 24V supply voltage Condition: DVDD=3.3V, VDDL=VDDR=24V, F S =48kHz, Load=4Ω with passive LC low-pass filter (L=10μH with R DC =0.12Ω, C=470nF); Input is 1kHz sinewave. Volume is 0dB unless otherwise specified. Symbol Parameter Condition Input Level Min Typ Max Units P O RMS Output Power (THD+N=0.32%) +8dB volume 30 W (Note 9) RMS Output Power (THD+N=0.25%) +8dB volume 20 W THD+N Total Harmonic Distortion + Noise -1dB 0.4 % SNR Signal to Noise Ratio (Note 8) -1dB 97 db DR Dynamic Range (Note 8) -60dB 105 db PSRR Power Supply Rejection Ratio -60dB 59 db Note 8: Measured with A-weighting filter. Note 9: Thermal dissipation is limited by package type and PCB design. The external heat-sink or system cooling method should be adopted for the larger RMS output power. Total Harmonic Distortion + Noise vs. Output Power (Mono) Revision: 1.2 12/30
Total Harmonic Distortion + Noise vs. Frequency (Mono) Spectrum at Peak SNR (Mono) dbv Spectrum at -60dB Signal Input Level (Mono) Revision: 1.2 13/30
Efficiency (Mono) Efficiency vs. Output Power (Mono) Efficiency(%) 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 Output Power(W) 12V 15V 18V 24V 4 Mono Efficiency (Mono) for PWM of Quaternary and Q+T Modulation Efficiency vs. Output Power (Mono) Efficiency(%) 100 90 80 70 60 50 40 30 20 10 0 24V Q+T 24V 0 10 20 30 40 50 60 Output Power(W) Revision: 1.2 14/30
Interface Configuration I 2 S Left-Alignment Right-Alignment System Clock Timing t PERIOD t LOW MCLK t HIGH t HIGH 10.1ns, t LOW 10.1ns, t PERIOD 20.2ns Timing Relationship (Using I 2 S format as an example) Revision: 1.2 15/30
Symbol Parameter Min Typ Max Units t LR LRCIN Period (1/F S ) 10.41 31.25 μs t BL BCLK Rising Edge to LRCIN Edge 50 ns t LB LRCIN Edge to BCLK Rising Edge 50 ns t BCC BCLK Period (1/64F S ) 162.76 488.3 ns t BCH BCLK Pulse Width High 81.38 244 ns t BCL BCLK Pulse Width Low 81.38 244 ns t DS SDATA Set-Up Time 50 ns t DH SDATA Hold Time 50 ns I 2 C Timing Parameter Symbol Standard Mode Fast Mode MIN. MAX. MIN. MAX. Unit SCL clock frequency f SCL 0 100 0 400 khz Hold time for repeated START condition t HD,STA 4.0 --- 0.6 --- μs LOW period of the SCL clock t LOW 4.7 --- 1.3 --- μs HIGH period of the SCL clock t HIGH 4.0 --- 0.6 --- μs Setup time for repeated START condition t SU;STA 4.7 --- 0.6 --- μs Hold time for I 2 C bus data t HD;DAT 0 3.45 0 0.9 μs Setup time for I 2 C bus data t SU;DAT 250 --- 100 --- ns Rise time of both SDA and SDL signals t r --- 1000 20+0.1Cb 300 ns Fall time of both SDA and SDL signals t f --- 300 20+0.1Cb 300 ns Setup time for STOP condition t SU;STO 4.0 --- 0.6 --- μs Bus free time between STOP and the next START condition t BUF 4.7 --- 1.3 --- μs Capacitive load for each bus line C b 400 400 pf Noise margin at the LOW level for each connected device (including hysteresis) V nl 0.1V DD --- 0.1V DD --- V Noise margin at the HIGH level for each connected device (including hysteresis) V nh 0.2V DD --- 0.2V DD --- V Revision: 1.2 16/30
Operation Description Reset When the RESET pin is lowered, will clear the stored data and reset the register table to default values. will exit reset state at the 256 th MCLK cycle after the RESET pin is raised to high. Power down control has a built-in volume fade-in/fade-out design for PD/Mute function. The relative PD timing diagrams for loudspeakers are shown below. The volume level will be decreased to - db in several LRCIN cycles. Once the fade-out procedure is finished, will turn off the power stages, clock signals (for digital circuits) and current (for analog circuits). After PD pin is pulled low, requires 128[maximum (Gain-1)/(1dB/step)] LRCIN clocks to finish the forementioned work before entering power down state. Users can not program during power down state. Also, all settings in the registers will remain intact unless DVDD is removed. If the PD signal is removed during the fade-out procedure (above, right figure), will still execute the fade-in procedure. In addition, will establish the analog circuits bias current and send the clock signals to digital circuits. Afterwards, will return to its normal status. Internal PLL (PLL ) has a built-in PLL with multiple MCLK/FS ratio, which is selected by I 2 C control interface. If PLL pin is pulled low, the built-in PLL is enabled; if PLL pin is pulled high, an external clock source for MCLK less than 50MHz should be provided. The MCLK/FS ratio will be fixed at 1024x, 512x, or 256x with a sample frequency of 48kHz, 96kHz, or 192kHz respectively. Anti-pop design will generate appropriate control signals to suppress pop sounds during initial power on/off, power down/up, mute, and volume level changes. Revision: 1.2 17/30
Default volume (DEF) The volume of is +8dB when DEF pin is high, and the volume is muted when DEF pin low. When using without I2C control interface, user should set the pin high. The user can change the values of the register table setting for volume control. For detailed information, refer to the register table section. Self-protection circuits has built-in protection circuits including thermal, short-circuit and under-voltage detection circuits. (i) When the internal junction temperature is higher than 160, power stages will be turned off and will return to normal operation once the temperature drops to 120. The temperature values may vary around 10%. (ii) The short-circuit protection circuit protects the output stage when the wires connected to loudspeakers are shorted to each other or GND/VDD. For normal 24V operations, the current flowing through the power stage will be less than 5A for stereo configuration or less than 10A for mono configuration. Otherwise, the short-circuit detectors may pull the ERROR pin to DGND, disabling the output stages. When the over-temperature or short-circuit condition occurs, the open-drain ERROR pin will be pulled low and latched into ERROR state. Once the over-temperature or short-circuit condition is removed, will exit ERROR state when one of the following conditions is met: (1) RESET pin is pulled low, (2)PD pin is pulled low, (3) Master mute is enabled through the I 2 C interface. (iii) Once the DVDD voltage is lower than 2.7V, will turn off its loudspeaker power stages and cease the operation of digital processing circuits. When DVDD becomes larger than 2.8V, will return to normal operation. Power on sequence Hereunder is s power on sequence. Please note that we suggested users set DEF pin at low state initially, and than give a de-mute command via I 2 C when the whole system is stable. PVDD DVDD MCLK RESET SCL de-mute SDA Revision: 1.2 18/30
Note. Set DEF pin at low state initially Revision: 1.2 19/30
I 2 C-Bus Transfer Protocol Introduction employs I 2 C-bus transfer protocol. Two wires, serial data and serial clock carry information between the devices connected to the bus. Each device is recognized by a unique 7-bit address and can operate as either a transmitter or a receiver. The master device initiates a data transfer and provides the serial clock on the bus. is always an I 2 C slave device. Protocol START and STOP condition START is identified by a high to low transition of the SDA signal A START condition must precede any command for data transfer. A STOP is identified by a low to high transition of the SDA signal. A STOP condition terminates communication between and the master device on the bus. In both START and STOP, the SCL is stable in the high state. Data validity The SDA signal must be stable during the high period of the clock. The high or low change of SDA only occurs when SCL signal is low. samples the SDA signal at the rising edge of SCL signal. Device addressing The master generates 7-bit address to recognize slave devices. When receives 7-bit address matched with 0110x0y (where x and y can be selected by external SA0 and SA1 pins, respectively), will acknowledge at the 9 th bit (the 8 th bit is for R/W bit). The bytes following the device identification address are for internal sub-addresses. Data transferring Each byte of SDA signaling must consist of 8 consecutive bits, and the byte is followed by an acknowledge bit. Data is transferred with MSB first, as shown in the figure below. In both write and read operations, supports both single-byte and multi-byte transfers. Refer to the figure below for detailed data-transferring protocol. Byte Write Multi-Byte Write START ACK ACK ACK STOP DEV_ADDR SUB_ADDR DATAIN R/W START ACK ACK ACK ACK STOP DEV_ADDR SUB_ADDR DATAIN DATAIN R/W Random Address Read Sequential Random Read START START ACK ACK ACK DEV_ADDR SUB_ADDR DEV_ADDR DATAIN NO ACK R/W START R/W ACK ACK ACK ACK DEV_ADDR SUB_ADDR DEV_ADDR DATAIN R/W START R/W STOP ACK DATAIN NO ACK STOP Revision: 1.2 20/30
Register Table The s audio signal processing data flow is shown below. Users can control these functions by programming appropriate settings in the register table. In this section, the register table is summarized first. The definition of each register follows in the next section. Address Register B[7] B[6] B[5] B[4] B[3] B[2] B[1] B[0] 0 State Control 1 IF[2] IF[1] IF[0] LR_SEL PWML_X PWMR_X PwmMode Zero-detect 1 State Control 2 X X FS[1] FS[0] PMF[3] PMF[2] PMF[1] PMF[0] 2 State Control 3 EN_CLKO HF X X MUTE CM1 CM2 CompSDMEn 3 Master Volume X MV[6] MV[5] MV[4] MV[3] MV[2] MV[1] MV[0] 4 Channel1 Volume X C1V[6] C1V[5] C1V[4] C1V[3] C1V[2] C1V[1] C1V[0] 5 Channel2 Volume X C2V[6] C2V[5] C2V[4] C2V[3] C2V[2] C2V[1] C2V[0] 6 HV UV selection X X X X HVUVSEL[3] HVUVSEL[2] HVUVSEL[1] HVUVSEL[0] 7 Power limit level X X X PL_EN PLL[3] PLL[2] PLL[1] PLL[0] 8 Attack Release rate X X X X A_R[1] A_R[0] R_R[1] R_R[0] 9 PWM mode switch X X X QTS[4] QTS[3] QTS[2] QTS[1] QTS[0] Detail Description for Register Note that the highlighted columns are default values of these tables. If there is no highlighted value, the default setting of this bit is determined by the external pin. Address 0 : State control 1 supports multiple serial data input formats, including I 2 S, Left-alignment and Right-alignment. The format is selected by users via bit7~bit5 of address 0. Revision: 1.2 21/30
BIT NAME DESCRIPTION VALUE FUNCTION 000 I 2 S 16-24 bits 001 Left-alignment 16-24 bits 010 Right-alignment 16 bits B[7:5] IF[2:0] Input Format 011 Right-alignment 18 bits 100 Right-alignment 20 bits 101 Right-alignment 24 bits other Reversed Select Left or Right 0 Left channel B[4] LR_SEL channel in MONO mode 1 Right channel 0 No exchange B[3] PWML_X LA/LB exchange 1 Exchange 0 No exchange B[2] PWMR_X RA/RB exchange 1 Exchange 0 Quarternary+Ternary B[1] PwmMode PWM modulation 1 Quarternary 0 Disable B[0] ZD_EN Zero detect 1 Enable Address 1 : State control 2 has a built-in PLL, which can be bypassed by pulling the PLL pin High. When PLL is enabled, multiple MCLK/FS ratios are supported. Detail setting is shown in the following table. BIT NAME DESCRIPTION VALUE FUNCTION B[7:6] X Reserved 00 32/44.1/48kHz B[5:4] FS Sampling Frequency 01 32/44.1/48kHz 10 64/88.2/96kHz 11 96/176.4/192kHz Revision: 1.2 22/30
Multiple MCLK/FS ratio setting table BIT NAME DESCRIPTION VALUE B[5:4]=00/01 B[5:4]=10 B[5:4]=11 B[3:0] PMF[3:0] Multiple MCLK/FS ratio setting 0001 Reset Default (256x) Reset Default (128x) Reset Default (64x) 0010 512x 256x 128x 0011 768x 384x 192x 0100 1024x 512x 256x Address 2 : State control 3 To prevent the DC current from damaging the speaker, a high pass filter (3dB frequency = 5Hz ) is built into the. It can be enabled or disabled by bit 6 of address 2. has a mute function which includes master mute and individual channel mute modes. When the master mute mode is enabled, both left and right processing channels are muted. On the other hand, either channel can be muted by using the channel mute mode. When the mute function is enabled or disabled, the fade-out or fade-in process will be initiated. The default settings of B[3:1] are determined by DEF pin. When DEF pin is pulled low or high, the default setting is muted or unmated. BIT NAME DESCRIPTION VALUE FUNCTION B[7] EN_CLK_ OUT PLL Clock Output B[6] HF High-Pass Filter B[5] X Reserved B[4] X Reserved B[3] MUTE Master Mute B[2] CM1 Channel 1 Mute B[1] CM2 Channel 2 Mute 0 Disabled 1 Enabled 0 5Hz 1 Disabled 0 Un-Mute (DEF=1) 1 Mute (DEF=0) 0 Un-Mute (DEF=1) 1 Mute (DEF=0) 0 Un-Mute (DEF=1) 1 Mute (DEF=0) B[0] CompSDMEn Compensate SDM 0 Disable frequency response 1 Enable Revision: 1.2 23/30
Address 3 : Master Volume Control supports both master-volume (Address 3) and channel-volume control (Address 4 and 5) modes. Both volume control settings range from +12dB ~ -102dB. Note that the master volume control is added to the individual channel volume control as the total volume control. For example, if the master volume level is set at, Level A (in db unit) and the channel volume level is set at Level B (in db unit), the total volume control setting is equal to Level A plus with Level B. -102dB Total Volume ( Level A + Level B ) +24dB. BIT NAME DESCRIPTION VALUE FUNCTION B[7] X Reserved 0000000 +12dB B[6:0] MV[6:0] Master Volume 0000001 +11dB 0000100 +8dB 0001100 0dB 0001101-1dB 1110010-102dB 1110011 - db 1111111 - db Address 4 : Channel1 volume BIT NAME DESCRIPTION VALUE FUNCTION B[7] X Reserved 0000000 +12dB B[6:0] C1V[6:0] Channel 1 Volume 0000001 +11dB 0000100 +8dB 0001100 0dB 0001101-1dB 1110010-102dB 1110011 - db 1111111 - db Revision: 1.2 24/30
Address 5 : Channel2 volume BIT NAME DESCRIPTION VALUE FUNCTION B[7] X Reserved 0000000 +12dB B[6:0] C2V[6:0] Channel 2 Volume 0000001 +11dB 0000100 +8dB 0001100 0dB 0001101-1dB 1110010-102dB 1110011 - db 1111111 - db Address 6 : Under Voltage selection for high voltage supply The under-voltage detection level is programmable via bit3~ bit0. Once the output stage voltage drops below the preset value (see table), will fade out audio signals to turn off the speaker. BIT NAME DESCRIPTION VALUE FUNCTION B[7:4] X Reserved Other 9.7V 1100 19.5V B[3:0] HVUVSEL[3:0] HV Under Voltage selection (Active) 0100 15.5V 0011 13.2V 0001 9.7V 0000 8.2V Revision: 1.2 25/30
Address 7 : Power Limit Level Users can enable or disable the power limit function via bit4. If this function is enabled, users can select power limit level via bit3~ bit0. BIT NAME DESCRIPTION VALUE FUNCTION B[7:5] X Reserved B[4] PL_EN Power limit enable B[3:0] CHX[3:0] Power limit level 0 Disable 1 Enable 0000 0dB 0001-2dB 0010-3dB 0011-5dB 0100-6dB 0101-8dB 0110-10dB 0111-15dB 1000-18dB 1001-25dB 1010-28dB 1011-35dB Address 8 : Attack rate and Release rate When the power limit function is enabled, the volume of the amplifier will be adjusted to the pre-defined maximum value. When the audio signal after volume control processing exceeds the pre-defined maximum value, the volume gain will be set to a smaller value according to the attack rate (volume reducing rate). When the audio signal after volume control processing is below the release threshold (2dB less than power limit level), will increase the volume level according to the release rate (volume increasing rate). BIT NAME DESCRIPTION VALUE FUNCTION B[7:4] X Reserved 00 0.4dB/ms Attack rate 01 0.2dB/ms B[3:2] A_Rate X X Reserved X X Reserved 00 0.4dB/ms B[1:0] R_Rate Release rate 01 0.2dB/ms 10 0.1dB/ms 11 0.05dB/ms Revision: 1.2 26/30
Address 9 : Quaternary and Ternary switching level If the PWM exceeds the programmed switching power level (default 30*40ns), the modulation algorithm will change from quaternary to ternary modulation. Ternary modulation has less switching loss, resulting in higher power efficiency during larger power output operations. If the PWM drops below the programmed switching power level, the modulation algorithm will change back to quaternary modulation. BIT NAME DESCRIPTION VALUE FUNCTION B[7:5] X Reserved 11111 62 11110 60 Quaternary and 10000 32 B[4:0] QTS[3:0] Ternary 01111 30 Switching level 01110 28 00010 4 00001 4 00000 4 2 Total Harmonic Distortion + Noise v.s. Output Power 1 0.7 0.5 Quaternary Q+T level 20 Q+T level 30 Q+T level 40 Q+T level 46 24V, 8Ω % 0.3 0.2 0.08 0.06 0.04 2 3 4 5 6 7 8 9 10 20 W Revision: 1.2 27/30
Θ A1 A ESMT/EMP Package Dimensions 7mm x 7mm 48-pin E-LQFP D2 E2 e b D1 E1 D E Symbols DIMENSIONS IN MILLIMETERS MIN. NOM. MAX. A 1.60 A1 0.05 0.15 b 0.17 0.22 0.27 D 9.00 BSC D1 7.00 BSC D2 4.5 5.0 5.5 E 9.00 BSC E1 7.00 BSC E2 4.5 5.0 5.5 e 0.50 BSC L 0.45 0.60 0.75 L1 1.00 BSC θ 0 3.5 7 Revision: 1.2 28/30
Revision History Revision Date Description 0.1 2010.07.28 Original 0.2 2010.10.20 Add Q+T test fig. 1.0 2011.03.17 1.1 2011.09.08 1. Modify system clock timing (page 14) 2. Delete Preliminary 1) Changed PVDD range from 12V~24V to 10V~26V. 2) Changed PVDD absolute maximum rating from 26.4V to 30V. 3) Changed output power from 10Wx2CH to 15Wx2CH for stereo and 20Wx1CH to 30Wx1CH for mono. 4) Remove the unsuitable output power description for output power > 15Wx2CH @ stereo and 30Wx1CH @ mono. 5) Updated the application circuit that the snubber circuit can be removed while the PVDD <=18V for stereo. 6) Added the application circuit for economic type, moderate EMI suppression. 7) Added power on sequence flow. 8) Updated MPQ description. 9) Removed the product ID of -EF48NAR with QFN 48L package. 1.2 2012.08.10 Added product id for TR packing Revision: 1.2 29/30
All rights reserved. Important Notice No part of this document may be reproduced or duplicated in any form or by any means without the prior permission of ESMT. The contents contained in this document are believed to be accurate at the time of publication. ESMT assumes no responsibility for any error in this document, and reserves the right to change the products or specification in this document without notice. The information contained herein is presented only as a guide or examples for the application of our products. No responsibility is assumed by ESMT for any infringement of patents, copyrights, or other intellectual property rights of third parties which may result from its use. No license, either express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of ESMT or others. Any semiconductor devices may have inherently a certain rate of failure. To minimize risks associated with customer's application, adequate design and operating safeguards against injury, damage, or loss from such failure, should be provided by the customer when making application designs. ESMT's products are not authorized for use in critical applications such as, but not limited to, life support devices or system, where failure or abnormal operation may directly affect human lives or cause physical injury or property damage. If products described here are to be used for such kinds of application, purchaser must do its own quality assurance testing appropriate to such applications. Revision: 1.2 30/30